<script type="text/javascript">
let a1 = new AudioContext();
let osc1 = a1.createOscillator();
let dest1 = a1.createMediaStreamDestination();
osc1.connect(dest1);
osc1.start(0);

let a2 = new AudioContext();
let source2 = a2.createMediaStreamSource(dest1.stream);
source2.connect(a2.destination);

</script>
